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by Penev, Lyubomir; Roberts, David; Smith, Vincent S.; et al.
by Unknown
by Wolcott, Harry F.; Paulus, Trena M.; Lester, Jessica N.; et al.
by Edited by Mark F. Watson , Chris H. C. Lyal , Colin A. Pendry
by Eduworks Co.
by DK Publishing
by Edcon Publishing
by Free Spirit Publishing
by Colin R. Townsend (Conservation and Biodiversity Research Group at Otago, New Zealand); Michael Begon (University of Liverpool); John L. Harper (University of Exeter)